He explained how he played basketball with DiCaprio, but the game was ruined after the actor's friends threatened to "kick ass". Clooney then allegedly won the game 11-0.

"The discrepancy between their game and how they talked about their game made me think of how important it is to have someone in your life to tell you what's what," he said.

"I'm not sure if Leo has someone like that."

George Clooney stars opposite Sandra Bullock in the sci-fi drama Gravity. The thriller is already a box office hit in the US and has been welcomed by rave critical reviews. It is out now in the UK and US.